One of the TIA crew, Jason Columbo told us that DeWALT also makes a combination table/miter saw. The D27112 Universal TTM which is not available in the US. My guess would be safety and regulations is what keeps this type of tool from being released in the US.
The idea really is genius! I often wonder why certain tools are just not available here. It all boils down to laws, costs and guys in suits. The video is not in English, but you get to see it in action. The date on the video says 2012, obviously Tools in Action is not the most up to date source for tool news! Check out our friends at Tool Stop UK, they have some pictures. It looks like the tool is not available. Check out DeWALT UK. Makita has one also. ( Thanks TheBearuk)